Box-closing device



Jan 6, 1931. w. LBLlcH ETAL 1,737,949

.- Box CLOSING DEVICE Filed July 8, 1929 4- 3*) 2) W n Si; i

Patented Jan; 6, 1931 di.

WERNER LBLIonAND HELMUTH Lnnroirggor in nEsDEN, GERMANY Box-CLOSINGDEVICE y Application ledJuly 8, 1929, Serial No. 376,593, and in GermanyNovember 9, 1926.

p The present invention relates toa device for closing boxesby means ofband iron and -a sleeve surrounding the ends of the iron.

Box closures, in which the ends of the band iron are surrounded byy asleeve and the latter as well as the ends provided with ribs by a presstool, are known to the art.` It is further known -to provide ribs ofrectangular cross section, but the latter feature is found K dicularlyto the rib and is perceptibl smaller than the original force so as to reuce considerably the danger of stretching the rib, y while the othercomponent force acting in the direction of the walls of the rib tendstoshift the band iron ends in the sleeve laterally until they hug theedges of the latter. Moreover, this component force finds expression intwo sub-components, one of which acts perpendicularly to the edge of thesleeve chiefly in the formoffrictional pressure and exerts too littleforce to bend up the sleeve while the other sub-component acts parallelto the edge of the sleeve and causes the band iron 'ends and the sleeveto become inter-wedged.y vThe connection eected according to. theinvention is perfectly firm, while the oblique position of the ribcompared with the cross ribs extending perpendicularly to the edge ofthe sleeve in the closures of known type increases considerably theresistance of the joint relative to the axial forces.

In this simple manner the sleeves can be protected against being bent upand having the ends slip out. I

TheV invention is illustrated lin the accompanying drawing, in whichFigure 1` is moved along the rib to the edges of the sleeve.

Referring to the drawing, 1 indicates the lower band, 2 the upper one. 3indicates the sleeve. 4L are the pressed ribs. -5 designates the wirearranged in front and 6 the wire in the rear. In Fig. 5a the joint isshown from above with the lengths of band iron 1 and 2 disposed one ontop of another and the obli ue rib 4f pressed onto the sleeve 3. On theands 1 and 2 act the forces c1 and z2 tending to break the oint. Thevillustration further` shows how the force a1 is separated into thecomponent forces b and c at the oblique rib f1. The same effect inopposite direction is brought about by the force a2, the components ofthis force being not shown, however, in the interest of greaterclearness of the illustration.

Fig. 5b shows the same closure from above,

Figs. 6 and 7 show a modification.'

edge of the sleeve is divided again into the component forces al and e.

The same happens to the band k2, though in" opposite direction, thecorresponding component forces being omitted in the drawy ing for thesake of clearness. v

Fig.l 5b therefore showsl how the shifting elfect on the bands 1 and 2has come to ran end by the inter-wedging ofthe bands with in thesleevevin opposite ydirections so that it is impossible to pushthe-bands 1 and 2 out of the sleeve 3.

, This closing device can be used not only for boxes but for all kindsof paokings Y Where band iron or Wire are used for effeeting a closure.

s We claim:-

InV a box closing device the combination of overlapping ends of a bandiron and a sleeve memberV enclosing said ends, the sleeve having a ribextending obliquely to 10K its longitudinal axis and said ends havinginterfitting ribs nested inthe rib of the sleeve.. Y. Y i Y InCQSIIlOIiY-Whereof We, hav? @fllxdl 011i? signatures. n 15 Y' WERNERLOBLICH."

